Internships are generally career-specific, on-the-job training positions at companies. Students often apply to internships based on their college major. There are internships available at the high school level, too. It is not uncommon for former interns to acquire full-time employment at an organization once they have enough necessary experience. Not all internships are paid. However, some of the unpaid ones might involve receiving college credit. Internships allow students to gain experience in their chosen field of study. Generally, your school counselor will be the best source of information regarding internships. Some companies do post information on their websites about internship opportunities. You can also try groovejog.com to search for internships.